Evaluation of light intensity and maintenance of light curing units used in clinics in the city of Recife

Abstract Objective To evaluate the light curing equipment used in the Recife city clinics and maintenance performed on these devices. Method The professionals participated in the evaluation voluntarily and were not identified in the questionnaires that were answered by them. He was asked about the disinfection methods, the frequency of changing bulbs and the technique often employed maintenance. It also promoted the evaluation of the curing light recording the information on the make, model and date of purchase. Measuring the light intensity using a radiometer (Demetron®) it was performed. Result All light curing units were light intensity with less than 300mW/cm2; 96.7% of professionals performed the servicing of your appliances only when necessary; 100% exchanged the lamp only when it burned, 40% of light curing units found themselves attached to dental chair; 86.6% of the debris had apparatus in the optical fiber; 50% of filters had fractures, 86.66% of them had debris; 60% of professionals employed only 70° alcohol as disinfection method; 53% of respondents performed the disinfection method after each patient. Conclusion All light curing units were evaluated with light intensity below the recommended and the absence of a periodic preventive maintenance protocol.

摘要 研究目的：评估累西腓市各诊所使用的光固化设备（light curing equipment）及其维护现状。
研究方法：由专业人员自愿参与本次评估，且其填写的调查问卷中不会标注身份信息。问卷内容涵盖消毒方式、灯泡更换频率及常用维护技术。此外，研究人员对固化灯（curing light）进行评估，记录其品牌、型号与购买日期，并使用辐照计（radiometer，Demetron®）测量光强度。
研究结果：所有光固化机（light curing units）的光强度均低于300mW/cm²；96.7%的专业人员仅在设备需要时才进行维护；100%的受访者仅在灯泡烧坏时才更换灯泡；40%的光固化设备安装于牙科治疗椅（dental chair）上；86.6%的设备光纤（optical fiber）内存在碎屑；50%的过滤器（filters）存在破损，其中86.66%的过滤器附着有碎屑；60%的专业人员仅使用70%乙醇作为消毒方式；53%的受访者会在每位患者就诊后实施消毒操作。
研究结论：所有被评估的光固化机光强度均未达到推荐标准，且未建立定期预防性维护规程。